Browsing by Author "Rigueiro-Rodriguez, A."
Now showing 1 - 10 of 10
Results Per Page
Sort Options
- Analysis of a silvopastoral system with animals of the autochtonous swine breed Porco Celta in Galicia (NW Spain)Publication . Iglesias, A.; Rigueiro-Rodriguez, A.; Mosquera-Losada, R.; Santiago-Freijanes, J.J.; Perez, C.; Rodriguez, I.M.; Carril, J.A.Pig traditional production systems in Galicia (NW Spain) are based on seasonal resources us like chestnut and pastures. The Breeders' Association of the autochthonous Celtic breed of pigs (ASOPORCEL) has developed a novel system within the traditional Galicia grazed forest areas in order to preserve landscape quality and biologic diversity, minimizing therefore the environmental impact of pig production. One of the main concerns of silvopastoral system implementation is the need of fencing. Fencing costs could be reduced if animals are rearing with infrastructures based on Pavlov animal condition reflex management in an extensive system. Therefore, cost reduction is obtained thanks to the clear reduction of personnel needs to feed animals, fencing costs and understorey clearance to reduce forest fires. In 2013 an experiment was carried out in Nebra (NW of Spain) in a young Pinus pinaster plantation. Pig stocking rate was around 3.85 pigs per ha (25 males and 25 females) in a total surface of 13 ha. Forest grazing program was initiated when animals were three months old in March 2013 and finished in December 2013. They were allowed access the whole plot. Concentrate was provided twice every day after sounding an alarm to attract pigs. All the animals adapted rapidly to the system. Two types o understory vegetation (Ulex and Pteridium) was sampled following a transect from close to far away feeding areas (three distances). Fern control was intense, being gorse less consumed. After nine months, average animal daily gain (ADG) obtained was 290 ± 4 gr. We can conclude that the used method is perfectly adaptable to the systems of exploitation suggested for the Celtic pig breed. This will be highly relevant to preserve this autochthonous breed and increase the number of extensive farms in the area while contributing to fix population dedicated to use silvopastoral systems.
- Calibration of the parameters of Yield-SAFE model in silvopastoral systems under Pinus radiata D. DonPublication . Ferreiro-Dominguez, N.; Palma, J.H.N.; Rigueiro-Rodriguez, A.; Minnuno, F.; Mosquera-Losada, R.The establishment of silvopastoral systems in which trees, animals and pasture are integrated within the same area is promoted by the EU (Council Regulation 1698/2005 and 1305/2013) because these systems diversify and sustain production with increased social, economic and environmental benefits for land users at several levels. However, the environmental and economic benefits of silvopastoral systems are highly difficult to predict due to the interaction of many factors. Furthermore research through field experiments is expensive and time-consuming when tree measurements have to be taken into account. One option to determine the benefits of silvopastoral systems could be the use of Yield-SAFE model that provides one method for overcoming these drawbacks. Moreover, in Galicia (NW Spain) the environmental and economic benefits of silvopastoral systems are different from the rest of Europe mainly due to the region’s humid climate and they have not yet been adequately evaluated. The objective of this study was the calibration of the parameters of the Yield-SAFE model in silvopastoral systems established with Pinus radiata D. Don in Galicia (NW Spain). Parameter calibration of Yield-SAFE model was performed after measuring height and diameter of Pinus radiata D. Don established at two densities (833 y 2500 trees ha-1) from 1996 to 2013. Moreover, pasture production was also determined in all years of the experiment. The initial estimation of the model parameters was based on an extensive literature review and on existing data sets with tree and pasture measurements. Yield-SAFE calibration procedure was successfully performed for trees. However, Yield-SAFE model was not adequately calibrated for pasture probably due to the multi specific pasture composition with different light and humidity requirements, responding differently to multiannual harvests. However, the Yield-SAFE model adaptation to Pinus radiata D. Don trees was successful and allows us to predict tree response to different situations, but an improvement of pasture parameters, or adapt model structure for multiple arable component species is needed to improved estimations.
- Carbon storage in the soil under different land uses in the south of PortugalPublication . Ferreiro-Dominguez, N.; Palma, J.H.N.; Paulo, Joana Amaral; Rigueiro-Rodriguez, A.; Mosquera-Losada, M.R.
- Celtic pig production in chestnut extensive systems in GaliciaPublication . Rigueiro-Rodriguez, A.; Santiago-Freijanes, J.J.; Ferreiro-Dominguez, N.; González-Hernandez, M.P.; Fernandez-Lorenzo, J.L.; Mosquera-Losada, M.R.
- Juglans growth under ploughing and Vicia villosa sowing understory managementPublication . Homar-Sanchez, C.A.; Urbán-Martínez, I.; Rigueiro-Rodriguez, A.; Mosquera-Losada, R.Inorganic fertilization has a clear impact on farm economy and on carbon footprint. Input reduction of mineral fertilizers will reduce the impact of this activity on GHG emissions as fertilizers produced in the farms should not be transported. This paper aims at reducing the inputs of nitrogen in a plantation of Juglans hybrid carried out in 2004. The experiment started in 2010 when six-year old trees had 11.4 dbh and 7.3 m of height. The experiment followed a desing of randomized block with two replicas. Treatments consisted of a sowing of Vicia villosa in alleys established at both sides of trees or ploughing. Vicia villosa sowing improved tree dbh and increased tree leaves concentrations of nitrogen and phosphorous.
- Maize yield in silvoarable systems established under Prunus avium L. in Galicia (NW Spain)Publication . Ferreiro-Dominguez, N.; Rigueiro-Rodriguez, A.; Palma, J.H.N.; Mosquera-Losada, M.R.; Gonzalez-Hernandez, M.P.
- Pasture production and quality in silvopastoral systems established with pine and downy birch after fourteen years of developmentPublication . Fernandez-Nunez, E.; Rigueiro-Rodriguez, A.; Mosquera-Losada, R.In silvopastoral systems grazing animals coexist with tree production. In these systems there is a great competition between tree and herbaceous plants for light, water and soil nutrients, which affect herbage forage production and quality. The aim of this study was to evaluate the herbage forage production and quality (protein, calcium and phosphorus levels) under Pinus radiata D. Don (pine) and Betula pubescens Ehrh (downy birch) silvopastoral systems after fourteen years of establishment in Galicia (Spain). In spring 1995, pine and downy birch silvopastoral systems were established. Trees were planted at 833 tree ha-1 and a mixture of Dactylis glomerata L., Trifolium repens L. and Trifolium pratense L was sown. Mineral fertilization (N:P:K) was applied every year and was compared to control treatment (no fertilization). During 2009 and 2010, three herbage forage harvests were performed per year in May (spring), July (summer) and December (winter) under downy birch and two harvests (summer and winter) under pine silvopastoral systems. Herbage forage production was estimated and crude protein (CP), calcium (Ca) and phosphorus (P) levels were analysed. The results showed that mineral fertilization significantly increased herbage production under pine and downy birch compared with no fertilization. These increments were about 80% under birch and 90% under pine systems allowing maintaining livestock use after fourteen years of establishment. Mineral fertilization treatment significantly increased CP, Ca and P levels compared to no fertilization. Downy birch systems showed higher Ca and P levels than pine independently of fertilization treatment and harvest. All pine and downy birch silvopastoral systems contained Ca and P above of the recommended levels for cattle and small ruminants maintenance requirements while, CP content was insufficient after fourteen years of establishment.
- Productivity of silvoarable systems established with Prunus avium L. in Galicia (NW Spain)Publication . Ferreiro-Dominguez, N.; Rigueiro-Rodriguez, A.; Mosquera-Losada, M.R.
- Productivity of silvopastoral systems under Pinus radiata D. Don estimated with Yield-SAFE modelPublication . Ferreiro-Dominguez, N.; Palma, J.H.N.; Rigueiro-Rodriguez, A.; Mosquera-Losada, M.R.
- Tree growth in a silvopastoral system established in acid soils with Pinus radiata D. DonPublication . Mosquera-Losada, R.; Rigueiro-Rodriguez, A.; Ferreiro-Dominguez, N.In Galicia (northwestern Spain), the soils tend to be acidic mainly due to the region’s humid climate, the prevalence of subtractive systems, frequent fires and, often, acidic parent material which can limit the tree growth and the pasture production in the silvopastoral systems. Therefore, it is advisable to carry out management techniques and fertilisation to improve soil fertility as well as the pasture and tree productivity. The objective of this experiment was to compare the effect of no fertilisation, three doses of sewage sludge (160, 320 and 480 kg N total ha-1), with or without liming (2.5 t CaCO3 ha–1), and the mineral fertilisation usually used in the region (8% N – 24% P2O5 – 16% K2O) on tree growth in a silvopastoral system established on an acidic forest soil with Pinus radiata D. Don in 1997. In the first years of the study, the results showed an increase of tree growth in the limed plots probably due to the reduction in the Al saturation percentage in the soil exchange complex. However, 12 years after the addition of lime and 9 years after the fertilisation with sewage sludge, the Al saturation percentage in the soil exchange complex was similar to that observed at the beginning of the study which decreased the tree growth in all plots and significant differences between treatments were not observed. Therefore, it is necessary to maintain an adequate regime of soil fertility to guarantee a sustainable growth of the forest stand.